(This is based on the quran with Rasm Uthmani script).
Sometimes it is confused to recite a verse from quran that contain hamzah with either 1 or 2 harakat length rate. Here is a guideline can be used to differentiate those two length rate easily, especially whenever together with ‘alif, waaw and yaa’.
Once found a hamza’, identify the position in the particular word or verse. The length rate is based on this situation that can see clearly. Please refer to the picture above to view the different.